import java.util.Scanner;

public class IFExercise01 {

    public static void main(String[] args) {

//        Scanner num1 = new Scanner(System.in);
//        System.out.println("请输入一个数：");
//        double n1 = num1.nextInt();
//        System.out.println("请输入第二个数：");
//        double n2 = num1.nextInt();
//        if(n1>10.0 && n2<20.0){
//            System.out.println("n1大于n2"+"\tn1=>"+n1+"\tn2=>"+n2);
//            System.out.println("两数之和："+(n1+n2));
//        }else{
//            System.out.println("n1小于n2"+"\tn1=>"+n1+"\tn2=>"+n2);
//            System.out.println("n1和n2并不满足条件："+(n1+n2));
//            System.out.println("两数之和："+(n1+n2));
//        }

        /**
         *

            Scanner num = new Scanner(System.in);
            System.out.println("请输入一个数：");
            int n = num.nextInt();
            System.out.println("请输入第二个数： ");
            int m = num.nextInt();
            if((n+m)%3==0&&(n+m)%5==0){
                System.out.println("n+m能被3和5整除"+"\tn+m="+(n+m));
            }

         */

//        Scanner year = new Scanner(System.in);
//        System.out.println("请输入一个年份：");
//        int yessold = year.nextInt();
//        if(yessold%4==0&&yessold%100!=0||yessold%400==0){
//            System.out.println(year+"该年为闰年");
//        }else{
//            System.out.println(year+"该年是平年");
//        }



//            分支控制
        Scanner num = new Scanner(System.in);
        System.out.println("请输入保国同志芝麻信用：");
        int zhima = num.nextInt();
        if(zhima>=100){
            System.out.println("保国同志信用极好");
        }else if(zhima>=80){
            System.out.println("保国同志信用优秀");
        }else if(zhima>=70){
            System.out.println("保国同志信用一般");
        }else if(zhima>=60){
            System.out.println("保国同志信用不及格");
        }else{
            System.out.println("信用需要在1-100中间");
        }


        boolean b = true;
        if(b==false){
            System.out.println("a");
        } else if (b) {
            System.out.println("b");
        } else if(!b){
            System.out.println("c");
        } else {
            System.out.println("d");
        }



    }


}
